[R-sig-Geo] raster::levels() not working in packaged function.

[Marcelino de la Cruz Rot]

Maybe including

import(raster)

or

importFrom("raster", "levels")

in the package NAMESPACE would help.

Cheers,

Marcelino

El 31/10/2020 a las 13:24, nevil amos escribió:
> Apologies, I cannot see how to make a rero for this issue.
>
> I have a function that uses levels(r) tor return the RAT of a raster "r"
> when the function is sourced from a script
> source(".\R\function.r")
> it works fine.
> when the function is built into a package and sourced from there
> library(mypackage) using the same script file to make the package
> levels(r)[[1]]
> the same line throws an error, as levels(myraster returns NULL
>
> If I modify the script to include the raster namespace:
> raster::levels(r)[[1]]
> Then I get the error
>   Error: 'levels<-' is not an exported object from 'namespace:raster'
>
>
> I have also tried just using levels(r) and putting raster as a depends
> rather than an import in the DESCRIPTION file for the package, this does
> not solve the error.
>
>
> Any suggestions on how to overcome the problem?
>
> many thanks
>
> Nevil Amos
>
> 	[[alternative HTML version deleted]]
>
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-- 
Marcelino de la Cruz Rot
Depto. de Biología y Geología
Física y Química Inorgánica
Universidad Rey Juan Carlos
Móstoles España